Control mechanism



F O O eb 1927 R. H. RAuscH CONTROL MECHANISM Filed Feb. 5, 1923 r K -L x "M I N H Q T2532 M.

INVENTOR 22.14, W M/YM ATTORNEY Patented Feb. 8, 19 27.

warren stares r are if ser es. 7 RGS'WELL H. IPWAJITSCH, OF PLAINFIELD, NEEVJ E BSEY. ASSIGNOF TO fiILES-BEMENT1 POND COMPANY, .OF NEW YORK, N. A CORPOB-ATION F NEVT JERSEY.

con'rnon MECHANISM. Application filed February, 5, 1923. Serialflo. 617.069.

My invention relates to machine tools and erally located adjacent to the drill spinc le. articularly to the control mechanism for Thus, in many cases, the means for operating radial drills, I the change gears and the means for operat One object of my invention'is-to provide a ing the drill spindle are somewhat widely 5v machine tool having amotor connected separated.

through. a set of change gears to a cutting In afmachine constructed in accordance, tool that shall be provided with means for with my invention, means are provided for v insuring the operation of the motor at slow insuring the rotating of the .change gear speed during the shifting of the gears in wheels during any shifting operation. 1o said setof change gears. -Moreover, means are prov'dedwherebythe 65 Another object of my invention is tofproshifting of the gears and the-operation of vide a machine tool having a motor conthe drill spindle may be controlled by a lenected through a set of change gears to a ver located adjacent to the. drill spindle. drill spindle and a controller for governing Forexample, in the radial drill illustrated I 15. the operation of the motor that shall be proin the drawing, an electric motor is con- 7e 7 l vided with means for simultaneously opernectedto the drill'spindle through a set of ating the controller and said set of change change gears, the motor is operated in a gearsl V forward and in a reverse direction at vari- Another object of my invention is to proous speeds bym'eans of a suitable controller, vide a machine tool having a motor corn and the controllerand the change gears are 7 nected to adrill spindle through a set of respectively operated'by twocam members change gears that shallbe provided with a which are mounted on a cam shaft. The controller for operating the motor at varicam shaft extends along the drill arm and- 0115 speeds in a forward and in a reverse diis operated by a manuallyoperated lever 'lo rection, two cam members for operating the cated adjacent to the drill spindle. The two 80 controller and said set of change gears, and cam members are so constructed and so means comprising a manually operated conmounted on the cam shaft with respect to trol lever for operating said cam members. each other that no change in the posit onof A further object of my mvention is to prothe gears in the change gear set can be made vide a radial drill having a drill arm mountunless the motor is operating at slow speed. 85

ed on the column and a motor mounted on In the accompanying drawing:

the drill arm and connected through a set Figure 1 is an elevationalview of a drill of change gears to a drill spindle that shall controlled inaccordance with my invention.

be provided with a controller for operating Fig. 2 is a section along the line 22' of 1 the motor in a forward and in a reverse di- Fig. 1. v 1 9o rection, two cam members for respectively Fig. 3 is an, enlarged view of the cam memoperating said controller and said set of' her for operating the changegears. changegears,and a manually operated han- Referring" to the drawing, a radial drill dle located adjacent to the drill spindle for 1 is shown having a base 2 and a column 3 40 operating said cam members. f mounted on the base 2. The columnv In operating change gears in a machine which rotates on the base 2, supports a drill 4 tool, as for example, in a radial drill, it is arm 4. The' drill arm 4: is movable vertivery advantageous to rotate the gears in the cally on slides on the column 3. The drill set at a very slowspe'ed during any shifting arm l carries a saddle 5 which supports 45 operation. It is apparent that the rotating a drill head 6. The drill head 6 carries a 1 of the gear wheels at a slow speed prevents spindle 7 which in turn supports a suitable clashing of the gear wheels uring the shifttool, not shown. The saddle 5 is movable ing operation. In many radial drills, the along slides'eformed on thedrill arm l in 1 shifting of the gear wheels to .varythespin-v any suitable manner and the head 6 is ro- 50 dle 'speed-is effected by lever which s lo-' t'atable upon the saddle 5'. The spindle 7 cated on the drill arm back of the column may be raised and lowered in any suitable:

supporting the'drill arm. .The means for manner on the head 6. The spindleisrocontrolling the rotation of. the drill spindle. tated by means of an arm shaft 8 which is Y Y and accordingly the rotation of the, gear connected to a motor-f9 in a manner to be wheels comprising the change gears is genhereinafter set forth. For a more complete 0 erated in accordance with my invention,

- lustra'ted by respectively of cam members 29 and description as to the construction and operation of the radial drill illustrated, reference may be had to the patent to Villard T. Sears, No. 1,296,863, dated March 11, 1919.

The motor 9, which is mounted on one end of the drill arm 1, is connected to the arm shaft 8 through a set of change gears 10. The set of change gears comprises a gear wheel 11 keyed to a shaft 12, which is directly connected to the armature shaft, two gear wheels 13 and 14, which are keyed to a short shaft 15, and a gear wheel 16 which is slidably mounted on the arm shaft 8 but adapted to rotate therewith. The gear wheels 11 and 16 respectively have clutch teeth 17, and 18 formed thereon and the shafts 12 and 8 are aligned so that the gear wheel .16 may be shifted to efiect engagement between the clutch teeth 17 and 18a The gear wheel 16 has a hub 19 formed thereon and a collar 20 is formed on the hub. An arm 21, which is operated in a manner to behereinafter set forth, has a bifurcated end portion which is fitted to the collar or groove 20 formed on the hub 19. In the construction above set forth, the gear wheel 16 may be moved towards the left, as shown in Fig. 1 of the drawing, to effectrengagement between the clutch teeth 17 and 18 and to effect adirect connection between the motor 9 and the .arm shaft 8. lVhen the gear wheel 16 is moved towards the right, as shown in Fig. 1 of the drawing, the motor 9 is connected to the arm shaft 8 through the auxiliary shaft 15. In the latter connection it will be noted the speed of rotation of the arm shaft 8 and ac cordingly of the spindle 7 will be very much reduced. g y 7 A controller 22, which is mounted on the arm 4 above the change gears 10, is adapted to operate the motor 9in a forward and in a reverse direction at various speeds. The controller is preferably of the drum type and may be of any suitable construction. The sha. t 23 of the controller carries a pinion2 1 which meshes with rack teeth 25 formed on a rod 26. Preferably a pointer 27 is fixedly connected to the shaft 23 for moving over ardi'al 28 to indicate the operative position of the controller. In Fig. 2 of the drawing, the operative position of the'motor. for each position of the controller has been indicated.

Preferably, in a drill constructed and opmeans areprovided for simultaneously operat-ing the change gears-10 and the drum control'ler 22. As before set forth, to effect operation of the motorat a very slow speed when effecting any shifting operation of the change gears. In the accompanyingdrawing, my invention has been ilcontrolling the conthe change gears 10 by means 30 which are mounted on a cam shaft 31. The cam member 29 troller 22 and the clutch teeth 17 adjacent position of it is desirable has a cam groove 32 formed therein which serves to control the operation of the controller 22. Onthe end of the rod 26 is mounted a roller which rides in the groove 32. Thus, the movement of the cam member 29 is transmitted through the rod 26 to the shaft 23 of the controller. In Fig. 2 of the drawing, the cont-roller 22 is shown in neutral position and movement of the cam member 29 in a clockwise or in a counterclockwise direction to position Bor to position A will effect no movement whatsoever of the shaft 23 and accordingly of the controller. The movement of the controller arrested in order to permit shifting of the gear wheel 16 prior to the engagement of and 18 or themeshing of the gear wheel 16 withthe gear wheel is. Referring to Fig. 2 of the drawing, it will be noted that, no matter which direction the shaft 31 is rotated will be given a movement of rotation in a clockwise direction. shown in neutral position. The next position of the controller operates the motor at a very slow orjogging speed in a reverse direction. It is in this position of the controller that meshing of the gear wheels during a shifting operation is effected. In the the controller, the motor reverse direction at a fast speed. position of the controller, the

operates in a In the next at such time 1s 7 The controller 22 is motor is operated at a slow speed in a reverse direction. At the next position the con troller is thrown into neutral and in the following positions the motor is accelerated to full speed in a forward direction.

Referring to Fig.3 of the, drawing, the cam member 30, which is cam shaft 31, l therein which serves to effect movement of the arm 21. The arm 21 is pivotally mounted on a bracket 38 and is provided with a pin 39 which projects into the cam groove 37. The bracket 38 is suitably mounted on the radial arm 4 and also preferably serves as a bearing for the cam shaft 31. In Fig. 3 of the drawing, the arm 21 is shown in a neutral position so that the motor '9 is disconnected from the drill spindle 7. A movement of the arm 21 towards the left to position B effects engagement between the clutch teeth 17 and 18 and a movement of the arm 21 towards the light effects meshing between the gear wheel -s14 and 16. The position of the arm 21' towards the right has been indicated by the character A The characters A. and B have also been used in Fig. 2 of the drawing to indicate the position of the cam member 29 corresponding tothe .positionsof the arm 21. Thus, when the arm 21 is moved to the left to position B to effect engagement between the clutch teeth 17 and 18, the cam member 29 is in position B and when the arm 21 is moved to the right to position A to effect connection between the motor 9 and the shaft 8 through the auxiliary shaft 15,

the cam member 29 is moved'to position A.

The cam members 29 and 30 are so constructed and are so adjusted with respect to eachother thatmeshing of the gear wheels in the set of change gears 10 is alwaysefat the jogging speed. Thus, the clashing of the fected When the motor 9 is operating gear teeth is prevented. Moreoven it should be noted, as before set forth,,that nomatter which directionthe shaft 31 is rotated'from neutral to-effect either a direct connection on said arm. On the saddle 5 is mounted a crank arm'40 which is connected to the cam shaft 31by means of a set of bevel gear wheels 32. Thus, by moving the crank arm 40, the cam members 29 and 30'may be op-' erated to simultaneously operate the contro1- ler 22 and the change gears 10. [While the form of mechanism herein shown and described constitutes a preferred form of embodiment of the invention, itis to be understood that other forms may be adopted, all coming within the scope of the claims which follow.

What I claim is: v 1. In .a machine tool, the combination comprising a set of change gears, a motor connected to said change gears, controller for governing the operatlon of sa1d motor,

and means comprising a manually operated lever for operating said controller and said change gears, movement of said lever during a portion of its movement simultaneously operating said controller and change gears, and movement of the controller during another portion of its movementmoving said c-ontrolleronly. Y I

'2. In a machine tool,the combination comprising a rotatable tool spindle, a motor for rotating said spindle, a controller for governing the operation of said motor at various speeds in a forward and in a re;

verse direction, a cam member for operating the controller, a set'of change gears for varying the spindle speed, a cam member for operating the change gears and means comprlsmg a manually operated lever for operating said controller and said change gears, movement of said lever. during a portion of its movement simultaneously operat 'ing said controller and change gears, and

movement of the controller during another portion'of its. movementmovlng said controller only.

. 3. In a machine tool, the combinationconr' prising a tool spindle, amotor for operating The cam said spindle, a controller'for operating said motor atvarious-speeds in a forward and in a reverse direction, a cam member for operating said controller, a set of change gears connected bet-weenthe motor and said spindle, a cam member for operating said change gears,'and meanscomprising a manually operated lever for simultaneously operating said cam members to govern the operation of the'controller and saidchange gears.

4. In a machine tool, the combination with a motor, a tool spindle, a set-of changegears for connecting the motor to said tool spindle,

a controller for governing the operation of said motor, andtwo cam members for'coir' trolling said controller and said change gears, of means for simultaneously operating said cam members, said cam members adapted to move-said gears during a portion only of the movement of said controller.

5. In amachine tool, the combination with a motor, a tools'pindle, a set ofchange. gears for connecting the motor to said tool'spindle, and a cam member for operating said change gears to vary the speed. of the spindle, ofa controller for operating saidmotor in afor ward and in a reverse directionxand for vary-' ing the motorspeed, a .oam member for. operating said controller, andmeans comprising. a manually operated lever for simultaneous' 1y operating said two cam members, said cam members adapted to move said gears during a portion only of the movement of said controller.

6. In a drill, the combination with a tool spindle, a source of power for operating said spindle, connecting means between said source of power and the spindle for varying the spindle speed, means for controlling said source of power to vary the speed of the spindle, and means comprising a man-' ually operated lever for operating said controller and said change gears,- movement of said lever duringa portion of its movement simultaneously operating said controller and changeflgears, and movement of the controller during another portion of ts movement moving said controller only.

7. In a drill having, a drill arm mounted on a column, the combination with a motor,

a tool spindle, a set of change gears for con- V necting the motor to said spindle and for operating the spindle at various speeds, a

controller for governing the operation of said motor at various speeds in a forward and ma reverse direction, and means comprising a manually operated lever for operatmg said controller and said change gears,

movement of said lever during a portion of its movement sin'iultaneously operating said controller and change gears, and movement of the controller during-anotl' er portion of its movement moving said controller only. 8. In a dull, the combination with a motor, ajtool spindle operated by said motor,

a set of change gears connect-ed between the motor and said spindle for varying the spin dle speed, and a controller for governing the operation of said motor, of a rotatably mounted shaft having two cam members fixedly mounted thereon, one of said cam members serving to operate said change gears when said shaft is rotated to vary the spindle speed and the other cam member serving to simultaneously operate said controller to govern the operation of the motor, and a control handle located adjacent to said spin die for operating said shaft.

9. In a drill, the combination with a motor, a tool spindle, a set of change gears con nected between the motor and said spindle for operating the spindle at different speeds, a controller for operating the motor at di3tferent speeds in a forward and in a reverse direction, and means comprising a manually operated lever for operating sald controller 'and said change gears, movement of said lever durin a portion of its movement simultaneously operating said COIltlOllGI and change gears, and movement of the controller during another portion or its movement moving said controller only.

10. In a radial drill having a dI'lll arm mounted on a column, the combination wlth a motor mounted on the arm, a tool spindle,

arm located adjacent to said spindle for opcrating said, shat. V

11. In a radial drill, the combination with a motor, a drill spindle-connected, to said motor, a set of change gears connected be tween said motor and the spindle, and a controller for governing the operation of said motor, of a cam member for operating said change gears, a second cam membercoaxial with said first cam member for operating said controller, the change gear cam memher being disposed and formed with respect to the controller cam member so that the motor is operated at very slow speed during the shifting of any gear, and manual operated means for simultaneously operating said cam members.

In testimony whereof, I hereunto aflix my signature.

noswnnn n. RAUSCH, 

